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Biology
Form 4 2025
TERM I
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WK LSN TOPIC SUB-TOPIC OBJECTIVES T/L ACTIVITIES T/L AIDS REFERENCE REMARKS
1 1
REPRODUCTION IN PLANTS AND ANIMALS
Fruit development.
By the end of the lesson, the learner should be able to:

To describe development of fruits in flowering plants.

Detailed discussion.

text book
KLB BK III.
P 98.CERTIFICATE PG 124
1 2
REPRODUCTION IN PLANTS AND ANIMALS
Classification of fruits.
By the end of the lesson, the learner should be able to:
To classify fruits using specific criteria.
Teacher presents several types of fruits and leads students in classifying them.
Detailed discussion, drawing of diagrams.

A variety of fruits, petri dishes
Blades
Containers.
KLB BK III.
P 99. CERTIFICATE PG 125
1 3
REPRODUCTION IN PLANTS AND ANIMALS
Placentation.
By the end of the lesson, the learner should be able to:

To define placentation.
To describe the process of placentation.
To identify types of placentation.

Teacher exposes the meaning of placentation.
Students examine ovaries of various fruits as the teacher exposes the types of placentation exhibited.
Students draw diagrams showing types of placentation.
Fruits
Beans
Sunflower
Pawpaw
Orange
Primrose, e.t.c
KLB BK III.
P 100.CERTIFICATE PG 130
1 4
REPRODUCTION IN PLANTS AND ANIMALS
Fruit and seed dispersal.
By the end of the lesson, the learner should be able to:
To explain adaptive features of fruits and seeds to their agents of dispersal.
Students examine fruits and seeds, observe external features, and group them accordingly to methods of dispersal.
Detailed discussion of observations made.


text book
KLB BK III. PP. 102-103 CERTIFICATE PG 130
1 5
REPRODUCTION IN PLANTS AND ANIMALS
Internal structure of fruits.
Sexual reproduction in animals. External fertilisation.
Internal fertilisation.
By the end of the lesson, the learner should be able to:
To label the parts of internal structure of a fruit.
To identify the functions of internal parts of a fruit.
To describe external fertilisation in amphibians.
To describe internal fertilisation and compare it with external fertilisation.
Teacher demonstration- Vertical sections of fruits.
Students draw and label the fruit internal structure.
Detailed discussion.
Tabulate differences between external and internal fertilisation.
charts
Strands of eggs of frogs.
KLB BK III. P. 104 
2 1
REPRODUCTION IN PLANTS AND ANIMALS
Reproduction in mammals. Reproduction in human beings.
By the end of the lesson, the learner should be able to:
To explain the reproduction process in mammals.


To draw and label the structure of male reproduction system.

Detailed discussion.



Drawing and labeling male reproduction system.


Wall charts-Reproduction system.
KLB BK III. P. 105 CERTIFICATE PG 149
2 2
REPRODUCTION IN PLANTS AND ANIMALS
Functions of parts of male reproduction system.
Male reproduction system of a male animal.
By the end of the lesson, the learner should be able to:
To explain the male reproduction system.
To identify parts of male reproduction system of a rabbit/ rat.
Detailed discussion.
To examine reproduction system of a male rabbit /rat.
Identify the parts of the reproduction system.
text book
Reproduction system of a rabbit/ rat.
KLB BK III. PP. 106-108 CERTIFICATE PG 150
2

Opening cat

3 1
REPRODUCTION IN PLANTS AND ANIMALS
Female reproduction system.
By the end of the lesson, the learner should be able to:
To draw and label parts of the female reproduction system.
Drawing and labeling.
chart
KLB BK III. PP.
108-110. CERTIFICATE PG 164
3 2
REPRODUCTION IN PLANTS AND ANIMALS
Functions of parts of female reproduction system.
Female reproduction system of a female animal.
By the end of the lesson, the learner should be able to:
To explain the functions of parts of female reproduction system.
To identify parts of female reproduction system of a female animal.
Detailed discussion.
Examine parts of a female reproduction system.
Identify the parts.
chart
Dissected female rat/ mouse/rabbit.
KLB BK III. PP.
108-110 CERTIFICATE PG  150
3 3
REPRODUCTION IN PLANTS AND ANIMALS
Formation of ova.
Fertilisation process.
By the end of the lesson, the learner should be able to:
To draw and label the human spermatozoon.
To describe the process of formation of ova.
To explain the fertilisation process.
Drawing and labelling.
Detailed discussion.
Q/A: Adaptations of male gamete to its function.
Discussion
Drawing diagrams.
text book
chart
KLB BK III. PP.
112-113 CERTIFICATE PG 151
3 4
REPRODUCTION IN PLANTS AND ANIMALS
Implantation.
The placenta.
Role of the placenta. Placental exchanges.
By the end of the lesson, the learner should be able to:
To define implantation.
To define ectopic pregnancy.
To describe the formation of the placenta and the structure of the placenta.
To state and explain the role of the placenta.
To identify substances allowed / not allowed to pass through the placenta
Drawing illustrative diagrams.
Discussion.
Exposition and discussion.
Exposition and discussion. Drawing diagrams showing placental exchanges.
Detailed discussion.
text book
Chart- The placenta.
KLB BK III. P. 114 CERTIFICATE PG 153
3 5
REPRODUCTION IN PLANTS AND ANIMALS
Pregnancy and hormones.
Abortion, miscarriage, birth.
By the end of the lesson, the learner should be able to:
To identify functions of human oestrogen and progestrone during pregnancy.
To describe processes of abortion, miscarriage and birth.
Tabulate functional differences.
Q/A: To elicit students responses on related issues.
text book
CERTIFICATE PG 160
4 1
REPRODUCTION IN PLANTS AND ANIMALS
Lactation and parental care.
Secondary sexual characteristics.
By the end of the lesson, the learner should be able to:
To explain the role of oxytocin in milk let down.
To draw and label mammary glands.
To state secondary sexual characteristics in males and females.
Discussion
Drawing and labelling mammary glands.
Detailed discussion.
Wall- charts mammary glands.
text book
KLB BK III. P. 120 
4 2
REPRODUCTION IN PLANTS AND ANIMALS
The menstrual cycle.
28-day menstrual cycle.
By the end of the lesson, the learner should be able to:
To explain the role of hormones in the menstrual cycle.
To represent hormonal levels on a 28-day chart.
Detailed discussion.
Open discussion.
Interpreting illustrative charts.
Chart- Phases of human menstrual cycle.
chart
KLB BK III. P. 121 CERTIFICATE PG 151
4 3
REPRODUCTION IN PLANTS AND ANIMALS
Menopause, infertility and emerging issues.
By the end of the lesson, the learner should be able to:
To describe hormonal changes at menopause.
To discuss emerging issues related to infertility and menopause.
Open discussion.
text book
KLB BK III. P. 123 
4 4
REPRODUCTION IN PLANTS AND ANIMALS
GROWTH & DEVELOPMENT.
Sexually Transmitted Infections & HIV/AIDS.
The concepts of growth and development.
By the end of the lesson, the learner should be able to:
To identify the symptoms of STIs.
To explain the mode of transmission of STIs / AIDS and discuss methods of control.
To differentiate between HIV and AIDS.
To distinguish growth from development.
Detailed discussion.
Q/A: Distinction and relationship between HIV and AIDS.
Q/A: Aspects that occur during growth.
Detailed discussion of growth and development.
Chart- STIs causal agents, symptoms, prevention and control measures.
text book
PP.
123-125 CERTIFICATE PG 169
4 5
GROWTH & DEVELOPMENT.
Measurement of growth.
By the end of the lesson, the learner should be able to:
To identify aspects that indicate growth of an organism.
Sketch a growth curve.
Discuss growth aspects-height, weight and volume.
text book
KLB BK III. P. 134 CERTIFICATE PG 178
5 1
GROWTH & DEVELOPMENT.
Growth phases.
Intermittent growth curve.
By the end of the lesson, the learner should be able to:
To describe lag and decelerating phases of growth.
Explain growth curve showing intermittent growth.
Students will have collected data, e.g. height of shoots of different ages.
Teacher assists students to draw growth curves.
Discussion- phases of growth.
Q/A: life cycles of insects.
Exposition and detailed discussion.
Shoots of known ages.
chart
KLB BK III. P. 135 CERTIFICATE PG 179
5 2
GROWTH & DEVELOPMENT.
Structure of the seed.
Longitudinal sections of monocots and dicots.
By the end of the lesson, the learner should be able to:
To draw and label a typical seed.
To state the functions of the parts of a seed.
To identify structural differences between monocots and dicots.
Students examine external structure of bean seeds and maize seeds.
Teacher assists them to identify the parts of the seeds.
Drawing and labeling the seeds.
Obtain longitudinal section of the seeds.
Identify structural differences of the specimens.
Carry out iodine tests.
Explain the observations.
Specimens of maize and bean seeds.
Hand lens
Maize and bean seeds.
Iodine
Scalpels.
KLB BK III. P. 136 CERTIFICATE PG 182
5 3
GROWTH & DEVELOPMENT.
Dormancy in seeds.
By the end of the lesson, the learner should be able to:
To define seed dormancy.
To explain factors that cause dormancy and ways of breaking dormancy.
Detailed discussion.
video
KLB BK III. P. 137 CERTIFICATE PG 188
5 4
GROWTH & DEVELOPMENT.
Seed germination.
Epigeal germination.
By the end of the lesson, the learner should be able to:
To describe the process of seed germination.
To investigate conditions necessary for germination.
To explain conditions necessary for germination.
To differentiate between epigeal and hypogeal germination.
To describe epigeal germination.
Observe previously prepared specimens.
Discuss the observations.
Observe previously prepared specimens of germinating bean seed/ castor seed.
Drawing comparative diagrams.
Seeds
Cotton wool
Flat bottomed flasks
Corks
T-tubes
Thermometers
pyrogallic acid
NaOH solution.
Specimens of germinating bean/castor seed at different phases of germination.
KLB BK III.
P 140. CERTIFICATE PG 184
5 5
GROWTH & DEVELOPMENT.
Hypogeal germination.
Primary growth of a seedling.
Region of growth in a root.
By the end of the lesson, the learner should be able to:
To describe hypogeal germination.
To describe primary growth of a seedling.
To determine the region of growth in a root.
Observe previously prepared specimens of germinating bean seed/ castor seed.
Drawing diagrams.
Brief discussion.
Group experiments- Observe previously prepared specimens to determine regions of growth.
Discuss observations made.
Draw relevant diagrams.
Specimens of germinating maize seed at different phases of germination.
Germinating bean seeds
Cork pin
Beaker
Indian ink
Blotting paper
Ruler.
KLB BK III. P. 141 CERTIFICATE PG 184
6 1
GROWTH & DEVELOPMENT.
Apical meristems.
Secondary growth.
By the end of the lesson, the learner should be able to:
To draw and label longitudinal and transverse sections of apical meristems.
To describe secondary growth of plants.
Drawing and labelling transverse sections of apical meristems.
Detailed discussion.
Charts- Apical meristems.
text book
KLB BK III. P. 144 CERTIFICATE PG 186
6 2
GROWTH & DEVELOPMENT.
Growth hormones.
Apical dominance.
By the end of the lesson, the learner should be able to:
To explain role of hormones in growth of plants.
To explain the role of auxins in apical dominance.
Discuss the role of IAA, gibberellins, cytokinins, and abscisic acid e.t.c, in plant growth.
Probing questions leading to definition and explanation of apical dominance.
text book
Shoot with lateral growth.
KLB BK III. P. 147 CERTIFICATE PG 190
6 3
GROWTH & DEVELOPMENT.
Growth and development in insects.
Role of hormones in insect growth.
By the end of the lesson, the learner should be able to:
To differentiate between complete and incomplete metamorphosis.
To identify hormones that promotes insect growth.
Q/A: Features of complete and incomplete metamorphosis of insects.
Exposition and explanations.
chart
text book
KLB BK III. PP.148-14.9 CERTIFICATE PG 194
6 4
GENETICS
The concept of variation.
By the end of the lesson, the learner should be able to:


Define Genetics.
Define variation.
Exposition of new concepts.
Probing questions on some variations in human beings.
Observe some variations in human beings such as tongue rolling, finger prints, students? heights, etc.
Discussion on the concept of variation.


Ink pad, hand lenses, white paper.

KLB BK IV.
PP 1-2.
6 5
GENETICS
Discontinuous variation.
Continuous variation.
By the end of the lesson, the learner should be able to:
Define discontinuous variation.
Define continuous variation.
Give examples of characteristics that show continuous variation.
Observe some discontinuous variations in human beings such as tongue rolling, sex, blood groups, etc.
Discussion on the concept of discontinuous variation.
Class activity ; students measure and record their heights;
Plotting of frequency-height graph;
Analyzing the graph;
Discussion with probing questions.
text book
Metre rules/ tape measure,
Graph papers
KLB BK IV.
P 3.
7 1
GENETICS
Causes of variation.
By the end of the lesson, the learner should be able to:
Discuss causes of variation.
Exposition of new concepts.
Discussion with probing questions.

text book
KLB BK IV.
P 4
7-8

Mid term exams and break

9 1
GENETICS
The chromosome.
By the end of the lesson, the learner should be able to:
Describe the structure of chromosomes.
Exposition of new concepts.
Probing questions.
Discussion.
text book
KLB BK IV. PP 4-5.
9 2
GENETICS
Chromosomal behaviour during mitosis.
By the end of the lesson, the learner should be able to:
Describe chromosomal behaviour during mitosis.
Exposition;
Teacher demonstrations;
Drawing diagrams;
Detailed discussion.
Scissors,
Manilla papers, thread, cellotape.
KLB BK IV. PP 5-6
9 3
GENETICS
Chromosomal behaviour during meiosis.
By the end of the lesson, the learner should be able to:
Describe chromosomal behaviour during meiosis.
Exposition;
Teacher demonstrations;
Drawing diagrams;
Detailed discussion.
Scissors,
Manilla papers, threads, cellotape.
KLB BK IV. PP 6-7
9 4
GENETICS
Genes and DNA.
DNA replication.
First law of heredity.
By the end of the lesson, the learner should be able to:
Describe the structure of genes and DNA.
Identify the role of DNA.
Describe DNA replication.
Explain the role of DNA in protein synthesis.
Describe Mendel?s experiments.
State Mendel?s first law.
Expository approach.
Exposition;
Drawing mRNA strands.
Exposition with explanations.
Chart- the double helix DNA.
text book
KLB BK IV. PP 7-8
9 5
GENETICS
Monohybrid inheritance.
By the end of the lesson, the learner should be able to:
Define monohybrid inheritance.
Differentiate between genotype and phenotype.
Draw diagrams to show genetic crosses.
Q/A to review Mendel?s first law.
Drawing diagrams to show genetic crosses.
Discussion with probing questions.
text book
KLB BK IV. PP 12-14
10 1
GENETICS
Genetic crosses using a punnet square.
By the end of the lesson, the learner should be able to:
Show fusion of gametes using a punnet square.
Completing a punnet square;
Brief discussion.
text book
KLB BK IV. PP 14-15
10 2
GENETICS
Ratios of phenotypes and genotypes.
By the end of the lesson, the learner should be able to:
Explain the concept of probability in inheritance of characteristics.
Q/A to review phenotypes and genotypes.
Simple experiments on probability.
Discussion.
Beans of two different colours, beakers.
KLB BK IV. PP 15-17
10 3
GENETICS
Incomplete dominance.
By the end of the lesson, the learner should be able to:
Cite examples of incomplete dominance.
Illustrate incomplete dominance with diagrams.
Exposition;
Discussion;
Drawing diagrams.
chart
KLB BK IV. PP 19-20.
10 4
GENETICS
Inheritance of ABO blood groups.
Inheritance of Rhesus factor.
By the end of the lesson, the learner should be able to:
Illustrate inheritance of blood groups with diagrams.
Describe inheritance of Rhesus factor.
Exposition;
Discussion;
Drawing diagrams;
Supervised practice on inheritance of blood groups.
Discussion.
chart
KLB BK IV. PP 20-21
10 5
GENETICS
Determining unknown genotypes.
Sex determination in man.
By the end of the lesson, the learner should be able to:
Determine unknown genotypes using test crosses and selfing crosses.
Describe sex determination in man.
Exposition;
Probing questions;
Drawing illustrative diagrams;
Discussion.
text book
KLB BK IV. PP 22-23
11 1
GENETICS
Sex-linked genes and traits.
By the end of the lesson, the learner should be able to:
Identify sex-linked traits in man.
Illustrate inheritance of sex-linked traits with diagrams.
Probing questions;
Drawing illustrative diagrams;
Discussion.
text book
KLB BK IV. PP 24-27
11 2
GENETICS
Non-disjunction.
By the end of the lesson, the learner should be able to:
Explain effects of non-disjunction as a chromosomal abnormality.
Exposition of new concepts;
Discussion.
text book
KLB BK IV. PP 30-33
11 3
GENETICS
Gene mutation.
By the end of the lesson, the learner should be able to:
Differentiate between chromosomal and gene mutation.
Identify types of gene mutation.
Q/A to review types of chromosomal mutation;
Using sequence models to show chromosomal mutations.
Discussion.
Models to show Chromosomal mutations.
KLB BK IV. PP 33-35
11 4
GENETICS
Disorders due to gene mutations.
By the end of the lesson, the learner should be able to:
Illustrate genetic disorders with diagrams.
Discussion on albinism, sickle-cell anaemia, haemophilia, colour blindness.
Drawing illustrative diagrams.
chart
KLB BK IV. PP 35-38
11 5
GENETICS
Applications of genetics.
By the end of the lesson, the learner should be able to:
Identify areas of practical application of genetics.
Probing questions;
Open discussion;
Topic review.
text book,video
KLB BK IV. PP 39-45
12-13

End term exams


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